[submodule-sync] bot-submodule-sync-main to main [skip ci] [bot]

[nvauto]

submodule-sync to create a PR keeping thirdparty/cudf up-to-date.
HEAD commit SHA: d6bdd03, cudf commit SHA: rapidsai/cudf@cf63dcd

This PR will be auto-merged if test passed. If failed, it will remain open until test pass or manually fix.

[nvauto]

HEAD commit SHA: d6bdd03, CUDF commit SHA: rapidsai/cudf@cf63dcd
Test passed: True

[nvauto]

SUCCESS - auto-merge

[greptile-apps]

Greptile Summary

Updates the vendored cuDF dependency to a newer upstream commit.

• Advances thirdparty/cudf from ffdcafc43544097b25a89b86c24420936607444b to cf63dcd9e1760655fc9b0b531b3aaddafb8273ce.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete changed-code failure identified.

The change only advances the cuDF submodule revision, and the available evidence establishes no broken repository contract or actionable integration failure.

Important Files Changed

Filename	Overview
thirdparty/cudf	Advances the cuDF submodule pointer; no concrete integration defect is established by the PR diff.

_{Reviews (1): Last reviewed commit: "Update submodule cudf to cf63dcd9e176065..." | Re-trigger Greptile}